Induction electricity meter



.g ,1. HARRIS INDUCTION ELECTRICITY METR Filed Jan. 25.' 1926 v Invenzm.*7A/M E Fw@ ZZ\ E l) ings carried by the lsupplemental support.

The parts carried bythe two-supports are f' respectively assembledtherewith, whereafter Y Patented Aug. 23, 1927.

V im iran PATENT oFFlcE.:

' JESSE HARRIS; oF'IiA IYETTE'; I'NDIANmnSSIGNoR To nUNoAN ELECTRICMANU- FAGTURING COMPANY,A OF LA FAYETVTE,

INDIANA, A CORPORATION OF ILLINOIS;

INDUCTION ELEGTRICITY METER.

' Application ledf'anuary 25V, 1926.'v Serial No. 83,579.

My invention relatesIv to induction `electricity meters of the type'employing a presi sure electromagnet,l a current .electro-magnet'spacedapart tromthe pressure electromagnet, a main support upon which atleastone ot' said electro-magnets is` mounted, :a

metallic armatureY -disc.eXtending into .the space between said magnets,afspindle carry ing said disc, a supplemental support Secured tothemainsupport,andspindle bearthe two supports are' assembled with thediscextending into thefspace betweensaid electro-magnets,

Hitherto, extreme caution Vhad toub'e. exercised in order to insert the'disc; vdirectly Y into ythe Space between the magnets without having`the `discistrilrea` magnet in the procj ess of assembling, to avoidinjury ot theY f disc andV orA the. jewel; mountings for the spindlecarrying the disc.V I guard'againstY the injury of' the discandthevbearings Efor* the spindle by providinga lguard structure; uponthe supplementalsupport, this guard .structure also extending =intothe.space betweenthe electro-magnets and `beyond the periphery of the disc.In thosevmeters'having both of their .electro-magnets mounted -V uponthe main support Il also. extend the.,

guard structureH across thegperiphery of thedisc so as to prevent the'armaturediscV .tromstriking' either electrofmagnebin .the` process ofassembling the 4twoSupports. vIn induction watt-,hour meters,itiscustomary to provide a metallic friction compensating platei sopositioned upon the supplemental support that :when the; two supportsareassembled, itT w-ill `be yso positioned as -to have inductivek relationwith .the pressure electro magnet .'of. naturejzto `furnish a supple-Vvg mental torque which will odset the frictiony between the spindles andtheir bearings.A In.. a; meterthus constructed, I so mount the;

friction compensating plate upon the supplemental support that it willalso project into the spacebetween the electromagnet, when the twosupports are assembled, and I provide a. portion upon this plate whichextends beyond the periphery of the disc and preferably across suoliperiphery, Afor the purpose stated. Inthe preferred embodiment oftheinvention, such portion is an integral continuation of said plate.

Whilejthe device of my invention is serviceable in assembling metersvwhere manufactured, lit is also yof especial service in Vrepairing themeters after installation as :it kguards against injury of the armaturesandthe kjewel bearings in the hands of un-V skilled or inexperiencedworkmen.

ing drawing showing the preferred embodi Amentithereol and in which Fig.l is a side Vview@illustrating Ythe main meter support vfand theelectro-magnets thereonv by dotted lines and the supplemental support bysolid i lines, portions being brokenl away, some portions of parts ofthesupplemental support and parts carried by the Supplemental support beingalsolshown by dottedlines;

YFig.` 2 is a rear elevation of thevfriction compensating plate and asupporting bracket therefor; and Figq?) is aplan viewof the l partsappearing in F ig. 2. l Y

- v.The ina-in meter support l is in the vform of a meter casing bodyclosed at its -rear ,si-de and furnished with a mounting lug 2 by lwhichit may be attached to a wall or Vother mounting, the nature ot' suchcasing body beingso well-knownby those familiar with'the art as torequire no extended dey,scri p.tion., yThe supplemental supportv 3 issuitably Secured to the main support, as

by, meansof screwsl passing through the 4,supplemental support intomounting lugs 5 formed integrally withthe main support. The meter isequipped with a pressure sure windingx to be connected across the Vmainsofthe system orl otherwiseto be sub-y ;ject to the pressure of the'current -traversingtheqmains and Aa soft iron laminated electroTmagnetthat is; inclusive off afcurrent winding 8 to be connected in serieswith a main of the system or otherwise subject rto the current of thesystem and a soft iron yso A` e'l e ':tro-jmagnet that is inclusive of apresa Icore 7 about'which the winding isfdisposed. ,:The meterisalsoequippedwith a current fig ' dle f arefrotatedc proportionately tofthe-watt- `Vage. The spindle' is provided withA--thefusual worm-gear 18in driving `relation to'ac'o'unt- Y ing train, not shown, whichissecuredfnpon =the '-frontendsfof mounting lugs'- 19 thatpromounting lugs11 carried by and projecting forwardly from the back wall of the mainsupport. Ifdonot wishy to'ibeflimited, however, tothe mounting yofbothni'a'gnets upon the main support.

`The AsuppleIi-iental .support .is .provided which respectively carrythe upper 4sleeve' bearing 14 and the lower step .bearing 15 lfora;-

the upright meter spindle 16. This spindlecarries the aluminum@Ion?vother. metallicarmature disc 17 which projects into the space which!inter-venes between "the coresof'the two magnets'fftol be 'i 4in,llinductiive@relation thereto, whereby vthe armature andhfits spinjectforwardly r'ombtlie Supplement support.

#Thefspindlelund its bearings are usuallyprovidedupon the front side of-ithe supplemental supportythis' supportfbeingpreferably f madeoffironsoas to constitute] afma'gnetic shield, in accordance with commonpractice. The armature disc 'fprojects@rearwardly throughian 'opening20- formed lin the -`sfupf plementaltsupport, the ztwo 'supports beingI-so'l assembledV that this armature disc will?l projectnntothespacebetween ythe electromagnets A'Atbrafelret 21 is mounted-upoiithe1 supplemental@ support/and carries the Sirio-f v ftionf` compensatingYplate 22 which overlies the disc 17=fand` 'projectsinto the's'pace-between the magnets and betweenlthelp'ressure .magnet andthe disclso astoCO'OperateWth the 'pressure* mavnetlto' vproduce a Y supple- .mentalitorque atf serves to compensate for! friotion at-'ther Vbearings fof'`the-Spindle 1 In 4accordance with* my invention, this friction'compensating I4plateV lfei'rte'ndsf rearwardly i Y to aifpoint'lbeyonclithe1periphery ofi-the1 disc-if -1. so that it,'\'instead-0the disc,willis'trikethei:

pressuremagnet, inf the process ofvass'emffblinglth'e' two supports, infthe Vevent 'that the'.l f; plate 'andi-armature disc are notifinsuitable register with the space between themagnets" 'f as fthesupplemental@A Support isffbeing ap- @preached to the main support, the`disc'fbeingi thereby' y'guarded-i from injury. The' 'friction'-A`eompensating platevis 2provided withl aporfof the plate,which-extendsaorossthelperipheryiof thediscsov that -thedisowill be furit also servesas a guard structure, the invention is not to be limited to suchemployment. Having.: thus -descri-bed my; invention, claim .1. .In aninduction electricity meter, the

Y Y. combinationwith. a. driving element ineludwithA.forwardly.projecting .lugs 12 and '13 J2e-,apport fand' alsoz.:extendinguinto: therspace `lbetween'@said electro-magnets rand -ibeyond'ffrtheiperipheryifoithe:dseS-andaacrossitheipe- Jingpressure'eleet'ro-magnet andV a-` current V"sure"eleetro-magnet.g bf.aimain supportupon "i which. "at :leastone:ofis'aidielectro-magnetsv isl i mounted g; 'a' metallic armature! diseextendl-ng I into the spacebetween saidmagnets; afspindle earryingilsaid disc a.'isuppleurent-alvsup- 'portv seeuredfto ther-main support; spindle "bearingsj'ear-riedi:'by then supplemental. supp'ort atandaretaallicf:frictionifcoinpensating v#plate earri'edibyfthe-Jsupplemental support and -having agfzpartfalsoextendingsrntoathe 1- space between said f'eleetro-magnetsi and be--yo'nd thee-periphery offithelidisc. v

1 35:11u ianbinductionielectrieity.,meten, the

f-fingl al 1pressurefeleetromagnetand a'i currentimetal'liefarmaturedisciliextending into. rthe 'isp acebetweensaidmagnets g. airispindlecarryfingsffsaidflidsc ;Naaisupplementali:support :.se-

vcarriedfb fthei'fsupplementaflfsupp'ortg, and a name.

' @Essai-mams.

' oombin'ation-fwith: affdrivinggelement inoludcuredf-tfthelmainsupportspindle? bearings Y lio Y

